Still friendly! Gwyneth Paltrow shared an adorable tribute to ex-husband Chris Martin in honor of his birthday.
“Happy birthday to the sweetest father and friend❤️we love you, cajm,” the Oscar winner, 50, wrote via Instagram on Thursday, March 2, alongside a selfie that showed her posing with the Coldplay frontman, 46. (The “cajm” in her post refers to the musician’s full name: Christopher…